| Term | Meaning or definition as related to yoga in Sanskrit or another language. |
| Kapal | skull or cerebrum.
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| Kapalbhati pranayama | a breathing technique aimed at cleaning the frontal part of the brain, done through rapid breaths with more force on exhalation.
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| Karma | action, the act of doing.
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| Karma yoga | the yoga of action, supreme consciousness through action.
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| Karna dhauti | one of the shatkarma which involves cleansing the ears.
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| Kati chakrasana | waist rotating pose.
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| Kevala kumbhaka | spontaneous cessation of breath without any conscious effort.
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| Klesha | afflictions or tensions, according to yoga there are 5 such afflictions present in humans from birth.
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| Koormasana | tortoise pose.
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| Kosha | sheath or body; realm of experience and existence.
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| Kriya | activity, dynamic yogic practice.
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| Kriya yoga | the practice of kundalini yoga.
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| Kukkutasana | cock pose.
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| Kumbhaka | breath retention.
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| Kundalini | man's retained energy or potential energy and consciousness.
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| Kundalini shakti | refers to the human's potential energy lying dormant in mooladhara (base) chakra like a coiled serpent. When awakened it rises up through the sushumna nadi.
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| Kundalini yoga | philosophy expounding the awakening of potential energy and inherent consciousness within the human body and mind.
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| Kunjal kriya | a cleansing technique that involves the cleansing of the stomach by drinking in water and then expelling it by inducing vomiting. |
